I cant get on xb live. it says that you cant connect. i got on last night. Im connected to both my network and the internet. Idk if this helps any but my bro is hooked up to the same router as i am.

Go to settings and network settings (Or whatever its called) and test your network to get on Xbox Live, if you cant try unplugging your modem and after 30 seconds plug it back in then try again, if that doesn't work check on your computer to make sure you can get to the internet, then contact support if it still doesn't work.